Answer:
C
Step-by-step explanation:
Rotation 90 degrees counter clockwise rule (x,y) -----> ( -y , x ) 
In order to find the answer we must first find the coordinates of the pre image 
The coordinates are...
x (1,-1) 
y (4,-1) 
z (4,-4) 
Now we apply the rule stated previously 
( The rule explanation: the x and y values swap and the y values sign changes. So if the y value was previously positive, after a 90° counter clockwise rotation, the y value will then be negative) 
x (1,-1) -----> swap x and y values ( -1,1) ------> flip sign of new x value ( 1 , 1 ) 
y (4,-1) ------> swap x and y values ( -1,4) -----> flip sign of new x value ( 1 , 4 ) 
z (4,-4) -----> swap x and y values ( -4,4) ------> flip sign of new x value ( 4,4) 
the new coordinates are X' (1,1) , Y' (1,4) , Z (4,4) 
Hence the answer is C